[20:09:13] <taylan>	 is there a way to use 'mw-collapsible mw-collapsed' without layout shift after page load?  i.e. really make it invisible on first page load, not hide later when the JS runs?
[20:11:34] <MatmaRex>	 taylan: yes, we have pure CSS handling for many common use cases for mw-collapsible, although not all. see the code here: https://gerrit.wikimedia.org/g/mediawiki/core/+/1c4e9156dde815d74c8c7bec23911e48e8db94e1/resources/src/jquery/jquery.makeCollapsible.styles.less
[20:14:13] <MatmaRex>	 if you're using a simple <div class=mw-collapsible>, you probably need to wrap the collapsible content (ie. everything except the header that you want to keep visible) in <div class=mw-collapsible-content>. otherwise the JS code is needed to figure out what needs to be hidden
[20:14:44] <taylan>	 MatmaRex: thanks, just figured it out :)
[20:15:08] <MatmaRex>	 :D